iv CONTENTS. 
XVIII. Observations on some of the Terrestrial Mollusca of 
the West Indies. By the Rev. Lansdown Guilding, 
B.A. F.L.S. ^ = = z T a p. 
XIX. Descriptions of two new Species of Erythrina. By 
Felix de Avellar Brotero, Professor of Botany at Coim- 
bra, F.M.L.S. - - | å » í p. 
XX. On the Insect called Oistros by the Ancient Greeks, and 
Asilus by the Romans. By William Sharp MacLeay, 
Esq., M.A. F.L.S. Communicated by the Zoological 
Club of the Linnean Society. - - - p. 
XXI. Some Account of a Collection of Arctic Plants formed 
by Edward Sabine, Esq., F.R.S. and L.S., Captain in 
the Royal Artillery, during a Voyage in the Polar Seas 
in the Year 1823. By William Jackson Hooker, LL.D. 
F.R.S. L.S. and H.S. Communicated by the Council 
of the Horticultural Society of London. - p. 
339 
342 
353 
360 
XII. À Com- 
